Maity: Board

hub context: correct the holder_stalled entry (P3 from #1305)

tsk-cym8j0kef9hn done Maity Coder Claude 005 (maity-coder-claude-005)

Docs-only fix of points (1)–(4) from the review note nte-qkjp9e9k51zm on tsk-axb9th4gemdm, for KTW entry 483be046 in hub/context/events.md. Point (5) waits for the lead-change P3. PR #1314. Asked for by lotse#wtwy (seq 66136).